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            <article class="content wrap" id="_content" data-uid="Keras.Adadelta">
  
  
  <h1 id="Keras_Adadelta" data-uid="Keras.Adadelta" class="text-break">Class Adadelta
  </h1>
  <div class="markdown level0 summary"><p>Adadelta is a more robust extension of Adagrad that adapts learning rates based on a moving window of gradient updates, instead of accumulating all past gradients. This way, Adadelta continues learning even when many updates have been done. Compared to Adagrad, in the original version of Adadelta you don't have to set an initial learning rate. In this version, initial learning rate and decay factor can be set, as in most other Keras optimizers.</p>
</div>
  <div class="markdown level0 conceptual"></div>
  <div class="inheritance">
    <h5>Inheritance</h5>
    <div class="level0"><span class="xref">System.Object</span></div>
    <div class="level1"><a class="xref" href="Keras.Keras.html">Keras</a></div>
    <div class="level2"><a class="xref" href="Keras.Base.html">Base</a></div>
    <div class="level3"><span class="xref">Adadelta</span></div>
  </div>
  <div classs="implements">
    <h5>Implements</h5>
    <div><span class="xref">System.IDisposable</span></div>
  </div>
  <div class="inheritedMembers">
    <h5>Inherited Members</h5>
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      <a class="xref" href="Keras.Base.html#Keras_Base_Parameters">Base.Parameters</a>
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      <a class="xref" href="Keras.Base.html#Keras_Base_None">Base.None</a>
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      <a class="xref" href="Keras.Base.html#Keras_Base_Init">Base.Init()</a>
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      <a class="xref" href="Keras.Base.html#Keras_Base_ToPython">Base.ToPython()</a>
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      <a class="xref" href="Keras.Base.html#Keras_Base_InvokeStaticMethod_System_Object_System_String_System_Collections_Generic_Dictionary_System_String_System_Object__">Base.InvokeStaticMethod(Object, String, Dictionary&lt;String, Object&gt;)</a>
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      <a class="xref" href="Keras.Base.html#Keras_Base_InvokeMethod_System_String_System_Collections_Generic_Dictionary_System_String_System_Object__">Base.InvokeMethod(String, Dictionary&lt;String, Object&gt;)</a>
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      <a class="xref" href="Keras.Base.html#Keras_Base_Item_System_String_">Base.Item[String]</a>
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      <a class="xref" href="Keras.Keras.html#Keras_Keras_Instance">Keras.Instance</a>
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      <a class="xref" href="Keras.Keras.html#Keras_Keras_keras">Keras.keras</a>
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      <a class="xref" href="Keras.Keras.html#Keras_Keras_Dispose">Keras.Dispose()</a>
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      <a class="xref" href="Keras.Keras.html#Keras_Keras_ToTuple_System_Array_">Keras.ToTuple(Array)</a>
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      <a class="xref" href="Keras.Keras.html#Keras_Keras_ToList_System_Array_">Keras.ToList(Array)</a>
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      <span class="xref">System.Object.Equals(System.Object)</span>
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      <span class="xref">System.Object.Equals(System.Object, System.Object)</span>
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      <span class="xref">System.Object.ReferenceEquals(System.Object, System.Object)</span>
    </div>
    <div>
      <span class="xref">System.Object.ToString()</span>
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  </div>
  <h6><strong>Namespace</strong>: <a class="xref" href="Keras.html">Keras</a></h6>
  <h6><strong>Assembly</strong>: Keras.dll</h6>
  <h5 id="Keras_Adadelta_syntax">Syntax</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public class Adadelta : Base, IDisposable</code></pre>
  </div>
  <h3 id="constructors">Constructors
  </h3>
  <span class="small pull-right mobile-hide">
    <span class="divider">|</span>
    <a href="https://github.com/SciSharp/Keras.NET/new/master/apiSpec/new?filename=Keras_Adadelta__ctor_System_Single_System_Single_System_Nullable_System_Single__System_Single_.md&amp;value=---%0Auid%3A%20Keras.Adadelta.%23ctor(System.Single%2CSystem.Single%2CSystem.Nullable%7BSystem.Single%7D%2CSystem.Single)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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    <a href="https://github.com/SciSharp/Keras.NET/blob/master/Keras/Optimizers.cs/#L91">View Source</a>
  </span>
  <a id="Keras_Adadelta__ctor_" data-uid="Keras.Adadelta.#ctor*"></a>
  <h4 id="Keras_Adadelta__ctor_System_Single_System_Single_System_Nullable_System_Single__System_Single_" data-uid="Keras.Adadelta.#ctor(System.Single,System.Single,System.Nullable{System.Single},System.Single)">Adadelta(Single, Single, Nullable&lt;Single&gt;, Single)</h4>
  <div class="markdown level1 summary"><p>Initializes a new instance of the <a class="xref" href="Keras.Adadelta.html">Adadelta</a> class.</p>
</div>
  <div class="markdown level1 conceptual"></div>
  <h5 class="decalaration">Declaration</h5>
  <div class="codewrapper">
    <pre><code class="lang-csharp hljs">public Adadelta(float lr = 1F, float rho = 0.95F, float? epsilon = default(float? ), float decay = 0F)</code></pre>
  </div>
  <h5 class="parameters">Parameters</h5>
  <table class="table table-bordered table-striped table-condensed">
    <thead>
      <tr>
        <th>Type</th>
        <th>Name</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><span class="xref">System.Single</span></td>
        <td><span class="parametername">lr</span></td>
        <td><p>float &gt;= 0. Initial learning rate, defaults to 1. It is recommended to leave it at the default value.</p>
</td>
      </tr>
      <tr>
        <td><span class="xref">System.Single</span></td>
        <td><span class="parametername">rho</span></td>
        <td><p>float &gt;= 0. Adadelta decay factor, corresponding to fraction of gradient to keep at each time step.</p>
</td>
      </tr>
      <tr>
        <td><span class="xref">System.Nullable</span>&lt;<span class="xref">System.Single</span>&gt;</td>
        <td><span class="parametername">epsilon</span></td>
        <td><p>float &gt;= 0. Fuzz factor. If None, defaults to K.epsilon().</p>
</td>
      </tr>
      <tr>
        <td><span class="xref">System.Single</span></td>
        <td><span class="parametername">decay</span></td>
        <td><p>float &gt;= 0. Initial learning rate decay.</p>
</td>
      </tr>
    </tbody>
  </table>
  <h3 id="implements">Implements</h3>
  <div>
      <span class="xref">System.IDisposable</span>
  </div>
</article>
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